在狄克-哈伯德模型中对超辐射莫特绝缘体的观测
Observation of a Superradiant Mott Insulator in the Dicke-Hubbard Model.
作者信息
Klinder J, Keßler H, Bakhtiari M Reza, Thorwart M, Hemmerich A
机构信息
Institut für Laser-Physik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany.
I. Institut für Theoretische Physik, Universität Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany.
出版信息
Phys Rev Lett. 2015 Dec 4;115(23):230403. doi: 10.1103/PhysRevLett.115.230403.
It is well known that the bosonic Hubbard model possesses a Mott insulator phase. Likewise, it is known that the Dicke model exhibits a self-organized superradiant phase. By implementing an optical lattice inside of a high-finesse optical cavity, both models are merged such that an extended Hubbard model with cavity-mediated infinite range interactions arises. In addition to a normal superfluid phase, two superradiant phases are found, one of them coherent and hence superfluid and one incoherent Mott insulating.
众所周知，玻色子哈伯德模型存在莫特绝缘相。同样，众所周知，迪克模型呈现出自组织超辐射相。通过在高精细度光学腔内实现光晶格，这两个模型得以合并，从而产生了一个具有腔介导长程相互作用的扩展哈伯德模型。除了正常的超流相之外，还发现了两个超辐射相，其中一个是相干的，因此是超流的，另一个是不相干的莫特绝缘相。
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